Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781C9E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326S · AIRBUS A-321neo

Hex
781C9E
Octal
36016236
Decimal
7,871,646
Country
CN
Tail
B-326S
Type
A21N
No current signal · last broadcast 21h ago
Flights observed
40
Distinct callsigns
10
Country
CN
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 781C9E.

Country allocation

The ICAO 24-bit address 781C9E falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 10 distinct

Callsign Airline Flights Last seen
CDC8787 - 10 2026-05-23
CDC8737 Zhejiang Loong Airlines 10 2026-05-23
CDC8738 Zhejiang Loong Airlines 6 2026-05-26
CDC8206 Zhejiang Loong Airlines 4 2026-05-23
CDC8989 Zhejiang Loong Airlines 2 2026-05-15
CDC8888 Zhejiang Loong Airlines 2 2026-05-21
CDC8788 - 2 2026-05-25
CDC8988 Zhejiang Loong Airlines 1 2026-05-18
CDC8859 Zhejiang Loong Airlines 1 2026-05-29
CDC8700 Zhejiang Loong Airlines 1 2026-05-24

Recent flights last 40

DateFlightRouteTakeoffLandingDuration
2026-05-29 CDC8859 HGH → CAN May 29, 08:45 UTCMay 29, 09:05 UTC20m
2026-05-26 CDC8738 SZX → HGH May 26, 15:35 UTCMay 26, 15:45 UTC10m
2026-05-25 CDC8738 SZX → HGH May 25, 15:20 UTCMay 25, 15:30 UTC10m
2026-05-25 CDC8788 - May 25, 13:10 UTCMay 25, 13:35 UTC25m
2026-05-24 CDC8700 CAN → HGH May 24, 07:15 UTCMay 24, 07:25 UTC10m
2026-05-23 CDC8206 HRB → HGH May 23, 13:10 UTCMay 23, 13:50 UTC40m
2026-05-23 CDC8787 - May 23, 05:20 UTCMay 23, 05:30 UTC10m
2026-05-23 CDC8737 HGH → SZX May 23, 03:25 UTCMay 23, 03:40 UTC15m
2026-05-21 CDC8888 PEK → HGH May 21, 02:55 UTCMay 21, 03:05 UTC10m
2026-05-18 CDC8988 PEK → HGH May 18, 11:50 UTCMay 18, 12:05 UTC15m
2026-05-18 CDC8888 PEK → HGH May 18, 03:01 UTCMay 18, 03:10 UTC10m
2026-05-17 CDC8738 SZX → HGH May 17, 16:35 UTCMay 17, 16:45 UTC10m
2026-05-15 CDC8989 HGH → CAN May 15, 17:35 UTCMay 15, 17:45 UTC10m
2026-05-11 CDC8206 HRB → HGH May 11, 12:30 UTCMay 11, 13:00 UTC30m
2026-05-11 CDC8787 - May 11, 04:35 UTCMay 11, 04:45 UTC10m
2026-05-11 CDC8737 HGH → SZX May 11, 02:45 UTCMay 11, 03:05 UTC20m
2026-05-10 CDC8787 - May 10, 04:19 UTCMay 10, 04:29 UTC10m
2026-05-09 CDC8787 - May 9, 04:30 UTCMay 9, 04:40 UTC10m
2026-05-08 CDC8737 HGH → SZX May 8, 12:34 UTCMay 9, 03:05 UTC14h 30m
2026-05-08 CDC8787 - May 8, 04:49 UTCMay 8, 05:00 UTC10m
2026-05-08 CDC8737 HGH → SZX May 8, 02:55 UTCMay 8, 03:14 UTC20m
2026-05-06 CDC8738 SZX → HGH May 6, 15:10 UTCMay 6, 15:20 UTC10m
2026-04-30 CDC8788 - Apr 30, 12:50 UTCApr 30, 13:05 UTC15m
2026-04-28 CDC8206 HRB → HGH Apr 28, 14:10 UTCApr 28, 15:00 UTC50m
2026-04-28 CDC8737 HGH → SZX Apr 28, 02:50 UTCApr 28, 03:00 UTC10m
2026-04-27 CDC8206 HRB → HGH Apr 27, 12:35 UTCApr 27, 13:20 UTC45m
2026-04-27 CDC8787 - Apr 27, 04:45 UTCApr 27, 04:55 UTC10m
2026-04-27 CDC8737 HGH → SZX Apr 27, 02:55 UTCApr 27, 03:20 UTC25m
2026-04-26 CDC8738 SZX → HGH Apr 26, 14:55 UTCApr 26, 15:05 UTC10m
2026-04-25 CDC8738 SZX → HGH Apr 25, 14:45 UTCApr 25, 14:55 UTC10m
2026-04-22 - - Apr 22, 17:35 UTCApr 22, 17:45 UTC10m
2026-04-20 CDC8787 - Apr 20, 04:50 UTCApr 20, 05:05 UTC15m
2026-04-20 CDC8737 HGH → SZX Apr 20, 03:15 UTCApr 20, 03:25 UTC10m
2026-04-18 CDC8989 HGH → CAN Apr 18, 16:40 UTCApr 18, 16:50 UTC10m
2026-04-17 CDC8787 - Apr 17, 05:35 UTCApr 17, 05:45 UTC10m
2026-04-17 CDC8737 HGH → SZX Apr 17, 04:00 UTCApr 17, 04:15 UTC15m
2026-04-16 CDC8787 - Apr 16, 05:39 UTCApr 16, 05:49 UTC10m
2026-04-16 CDC8737 HGH → SZX Apr 16, 03:55 UTCApr 16, 04:20 UTC25m
2026-04-13 CDC8787 - Apr 13, 05:40 UTCApr 13, 05:55 UTC15m
2026-04-13 CDC8737 HGH → SZX Apr 13, 03:20 UTCApr 13, 03:40 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the B-326S page for operator, model, and routing details .

Mode-S 781C9E frequently asked

What is Mode-S code 781C9E?
781C9E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326S.
Where is Mode-S 781C9E registered?
Mode-S code 781C9E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C9E broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C9E, octal 36016236, decimal 7,871,646.
What flights does 781C9E operate?
Mode-S 781C9E has broadcast 10 distinct callsigns, including CDC8787, CDC8737, CDC8738, CDC8206, CDC8989.